JET JTM-4VS-1 Mill with ACU-RITE 203 DRO, X & Y-Axis Powerfeeds, and Power Draw Bar is a professional-grade variable speed vertical milling machine from JET, engineered for machinists and production shops that demand precision, durability, and efficient workflow. Built using the Certified Meehanite casting process, this mill delivers consistent, reliable performance across a wide range of milling operations. The inclusion of the ACU-RITE 203 Digital Readout, X and Y-Axis powerfeeds, and a pneumatic power draw bar makes this a fully equipped, productivity-focused package backed by JET's industry-leading two-year full service and parts warranty.

Key Features

• Adjustable gibs throughout for precise, customizable fit and reduced play across all axes
• Heavy duty splined motor drive for robust power transmission and long-term reliability
• Internal coolant tank built into casting base for use with a coolant system (coolant pump not included)
• Large diameter chromed quill for smooth travel and extended wear resistance
• One shot lubrication system for fast, thorough lubrication of all critical components
• Precision hardened and ground ways and table for accurate, repeatable positioning
• Spindle head is internally cooled to maintain consistent operating temperatures during extended use
• Tolerance test sheet included to verify machine accuracy upon delivery
• Certified Meehanite casting process provides a rigid, vibration-dampening machine structure
• Precision bored and honed milling head ensures quality cuts with excellent surface finish
• Three-stage power downfeed with automatic stop for controlled, hands-free quill feeding
• Variable spindle speed range of 60 - 4,200 RPM to accommodate a wide variety of materials and tooling
• R-8 spindle taper with a collet capacity of 1/8 to 7/8 inch
• Pneumatic power draw bar for quick and easy tool changes
• X and Y-Axis powerfeeds for reduced operator fatigue during long cuts
• ACU-RITE 203 Digital Readout for accurate, real-time positional feedback on two axes
• Available in single phase power configuration (2 HP, 115/230V, 1Ph)

Specifications

• MPN: JT9-690422
• Stock Number: 690422
• Country of Origin: Taiwan
• Style (Type): Variable Speed R8
• Motor: 2 HP, 115/230V, 1Ph
• Range of Spindle Speeds (RPM): 60 - 4,200
• Spindle Taper: R-8
• Spindle Travel (In.): 5
• Quill Diameter (In.): 3-3/8
• Quill Down Feed Rates (IPR): .0015 - .003 - .006
• Collet Capacity: 1/8 - 7/8
• Table Longitudinal Travel (In.): 34
• Table Longitudinal Travel With Powerfeed (In.): 28-3/4
• Table Cross Travel (In.): 12
• T-Slot Centers (In.): 2-1/2
• Distance Spindle to Column - Max. (In.): 19
• Max Distance Spindle to Table (In.): 17-1/2
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Number of Axis: 2
• Powerfeed: X and Y-Axis
• Power Draw Bar: Pneumatic
• Prop 65: Cancer and Reproductive Harm

Frequently Asked Questions

What spindle taper does the JET JTM-4VS-1 use, and what is the collet capacity?

The JTM-4VS-1 uses an R-8 spindle taper and accepts collets ranging from 1/8 inch to 7/8 inch, making it compatible with a wide selection of standard R-8 tooling commonly used in vertical milling applications.

Does this mill come with a coolant pump?

The machine features an internal coolant tank built directly into the casting base, which is designed for use with a coolant system. However, the coolant pump is not included and would need to be sourced separately.

What power configuration does the JTM-4VS-1 require?

This model is configured for single phase power at 2 HP, 115/230V, 1Ph, making it suitable for shops that do not have three-phase power available.

How do I know the machine is accurately calibrated when it arrives?

Every JET JTM-4VS-1 mill ships with a tolerance test sheet included, providing documented verification of the machine's precision and accuracy as it left the factory.